Data extraction from wireless sensor networks using fountain codes

TitleData extraction from wireless sensor networks using fountain codes
Publication TypeJournal Article
Year of Publication2007
AuthorsOka, A., and L. Lampe
Journal2007 2nd IEEE International Workshop on Computational Advances in Multi-Sensor Adaptive Processing
Pagination53–56
Abstract

We propose a universal and energy efficient method of data extraction from a Wireless Sensor Network (WSN), based on Digital Fountain Codes (DFCs) and joint-source channel decoding. We consider a WSN that aims to recreate a binary field at a distant Fusion Center (FC). Our method (i) exploits the feedback channel from the FC to the WSN to implement a distributed 'rate-less' DFC that automatically tunes the number of transmissions to the channel capacity, and (ii) treats the spatiotemporal dependencies in the natural field as an outer code, and jointly decodes this concatenation at the FC. For moderate distortion the proposed procedure achieves an energy efficiency close to the rate-distortion limit, while retaining the important property of having a computationally simple encoder invariant to changes in the statistical model of the source or the channel.

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